ADHD can cause kids to act in different ways, depending on the kid who has it. Most kids with ADHD have problems concentrating and paying attention. Some also might have trouble sitting still in class and waiting for their turn. They might yell out the answers before other kids have a chance to raise their hands.
Isotonic Muscle Contractions. Muscle contractions which result in movement are known as isotonic contractions. There are two types of isotonic muscle contraction-Concentric and Eccentric. Concentric Contractions. Concentric muscle contractions are the most common form of contraction.
Noun. 1. muscle contraction - (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber). contraction, muscular contraction.shortening-act of decreasing in length; the dress needs shortening.raxton-Hicks contraction, false labor-painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency. vaginismus-muscular contraction that causes the vagina to close; usually an anxiety reaction before coitus or pelvic examination.